linden



C. LINDEN.

SNAP GAGE. VAPPLICATION FILED MAR/l5, 1919.

2 SHEETS-SHEET I.

1,322,029. Patented Nov. 18,1919.

7 M Q 8 J k% 5 Y l 6 4 LZ -{J ,2 5 E ammmtoz Charles L I 667611,

C. LINDEN.

" SN-AP GAGE.

APPlalCATION FILED MAR. 1:5, I919.

Patented Nov. 18, 1919.

2 SHEETS-SHEET 2.

STATESPATENT curios.

urinates lZJINDEN, or scrnnrsoanconnncricur.

SNAP-GAGE.

T0 altwhom itmayconoern:

Be it known that I, Ci-munns LINDEN, a citizen of the United States,residing at the town of Stratford, inlthe county of Fairiield andystateof Connecticut, have invented. certain new and useful Improvements inSnap-Gages; and I do declare the following to be akfull, clear',andexact description of the. invention, such. as will enable others skilledinthe art to} which it appertains to make and use the same. i

: p This invention relates to. certain new and havin a standarddimensionof thickness.

The principal object'is to provide a snap gage havingtwo sets ofmeasuringpins, one set comprising stationary pins for measuring standardwork ofsuniform thickness and the other set comprising a yieldable pinpermitting a latitude of measurement from the standard work. 3 i .E'Theinvention also resides in specific features of construction hereinafterdescribed and claimed, reference being had to the. accompanying drawingswherein;

Figure 1 is a slde elevat on of the preferred embodiment of theinvention, parts being in section to more clearly disclose theconstruction Fig. 2 is a top edge view thereof;

Fig. 3 is a side elevation of a modified form of the invention; and

Fig. 4 is a similar view of a further modification of the invention.

Referring more in detail to the drawing and particularly Figs. 1 and 2,the numer als 1 designate the arms or body members that have a removablespacing block 2 secured therebetween by screw fastenings 3, thearrangement of the parts forming a U- shaped structure between the armsof which the work is inserted for measuring. To this end a pair ofstationary pins 4 is fixed in opposing sockets adjacent the inner endsof the arms 1 for standard measurements, and a pair of pins 5 isdisposed in a similar manner adjacent the outer ends of said arms.

One pin 5 is stationary while the other pin 5 is mounted to slide in asocket or chamber 6 and is limited in its sliding by a transverse pin 7extending within a cut out or recess 8 in the periphery of the pin. Areduced stem 9 forms the inner end of this movable pin extends throughthe opposing end wall of the chamber and operates in ,a reduced Hbearing 10 A coiled spring 11 encircles the stem and is confined betweenthe inner end wall of the bearing 10 and theenlarged portion of the pin5 Spccification of Letters Patent. Patented NOV, '18, 1 919,

i 1 Application enamel-c1115, 1919. seriaiho. 282,882. i

determined distance apartaxially of the gage pin. a

Normally, the space intervening; pins 5 is considerably less than thatbetween the standard gage pins 4: and when a standard piece of work,which exactlylffits' between said pins. 1, is inserted between the pins5 the yieldable pin 5 is pushed outwardly until the outerend of stem-9is at a point midway between. the two gaging faces or levels1-2 and 13Thus, when work of standard gage is inserted from thefront or in contactwith the relatively yieldable pimit will thrust said pin back oroutwardly. But, shouldna piece of workbe insertedbetween: the standardgage pins hand the measurement be ascertained i to be somewhat less thanstandard gage, such work is then inserted between the pins 5, and if theend of, the stem 9 is not thereby projected at least flush with the face12, such work is rejected as undersize. Should work, inserted betweenthese pins 5, thrust the stem 9 beyond the face 13, such work isrejected as being oversize.

But any work inserted between the pins 5 j is accepted, if it does notforce the slidable pin either below the face 12 or beyond the face 13,since the proper gage difference between the two faces is only oneone-thousandth of an inch, while the standard gage position of the endof the stem 9 is midway between these faces. It therefore follows thatthe difference between these faces 12, 13, and the standard gageposition of the stem 9 is one two-thousandths of an inch,

and a variation such as'this is immaterial.

Of course, in gages for finer or coarser work, this ratio would bedifferent? In the form of invention depicted in Fig. 3 and known as thebench gage, one arm 1s replaced by a bed plate 14 serving as a commongage contact for both the stationary pin 4 and the yieldable pin 5.

A double gage is illustrated in Fig. 4 and consists of a common bedplate 1 1 having gage blocks 15 secured on opposite sides to space theirrespective arms 1. from the plate at varying distances. Thisconstruction enables the user to gage two different standard grades ofwork with but the one instru-' Havingthus'describd my invention whatIclaim as new-and desire to secure by Letters "Patent-isri -1. Ajsnapgage' including spaced r'nem-i bers each havinga' standardgaging surface-'20"13arfied fixedly thereby, said surfaces being opposed to oneanother, one of said members having therein a sooket,"a gage pin yieldably supported within said socket which is open atboth ends, said pinbeing adapted to be projected through said socket and having oneendopposed by a stationary gagingsurface on the other member, from whichsurface said end is normally spaced by a distance less than that betweensaid standard surfaces, and means cooperating. with the other end of.the pinL for defining the standard, and minimum and maximum outwardly- 91 projected positions'of the'pin.

- -2. A' snap gage-comprising a pair of 0pposing members, a gage blockof predeter- "mined width connecting the members at their rear end andserving as a sustaining spacer therefor, stationary standard gage pinsfixedly carried by said members and projecting from the inner facesthereof near said block and in opposing relation, a gage pin fixedlycarried by one of said members and proj ecting from the inner facethereof near the outer end, and a resiliently yieldable ga e pinopposing the last named pin and slidable within an opening formed in oneof said members, the latter provided at its outer edge adjacent saidopening with stepped gaging surfaces.

3 A snap gage comprising a pair of opposing members, a gage block ofpredetermined width connecting the members at one end and serving as asustaining spacer therefor sald membera-hayang fixed standard gage pinsprojecting in opposing relation from the inner edges of said members,the

forward extremity of one of said members having an opening therethroughfrom the inside edge to the outside edge which opening at the outsideedge leads into a stepped formatio'nthe distance between the steppedfaces being predetermined, a resiliently yield- 7 CHARLES LINDEN.

able gage pin slidable within said opening and adapted when forcedoutwardly to reg-

